There are a few factors that may contribute to your malfunctions, however, this DPM Recoil Reduction System for Sig Sauer P-365 will allow for tuning of your recoil system and can assist in making your P365 function properly. When using compensators and suppressors, tuning your recoil system is a good place to start for correcting malfunctions.
Different platform but obviously very similar; my DPM kit basically 100% fixed my P320 X carry legion when shooting suppressed. It would probably fail to feed 1/3 shots. After 100 rounds of break in I haven’t had one failure with the DOM kit. I started with the lightest spring and haven’t went back. Still shoots great unsuppressed also.